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No. 66,222. PATENTED JULY 2, 1867.

A. CUNNINGHAM & A. SHARP.

POWER HAMMER.

3 guitar; istas gaunt @iftrt.

ALBERT CUNNINGHAM AND ALONZO SHARP, 0F SALEM, 01110.

Letters. Patent No. 66,222, dated July 2, i867.

IMPROVED POWER HAMMERr T0 ALI; WHOM IT MAY CONCERN: Y

Be it lrnown'that we, A. Comment: and SHARP, of Salem, in the county ofGolumbiana, and State of Ohio, have invented certain new and usefulimprovements in Power-Hammers; and we do hereby declare that V thefollowing is a' full and complete description of the same,reierencebeing had to theaccompan'ying drawings, making a partof thisspecification, in which Figure 1 is a side view of the hammer. Figure 2,a rear end view. I Figure 3, a top view.

Figure 4, a front view.

Like letters refer to like parts in the difl'erent views.

A, fig. 1, is the bed-plate of "the-hammer, from which project the staysB, between the checks of which is mounted a pulley, G upon the shaft Djournalled in the stay, as shown in the drawing. On the inner end of theshaft is keyed a crank-wheel, E, the purpose of which will hereafter beshown. F, fig. 1, is a standard, in

- the upper part of which iscnt a-slot, G, (figs. 2 and 3,) to which'isfitted a lag, H, and secured in the'slot by apair of washers, I.Immediately below the lower end of the slot is a lug,'J, through whichpasses the rod K, which also passes throu'ghthe adjustableflug H. Al;the'upper end o.the rod is placed a collar, L, between which and theadjustable lngH is'aspiral spring, M. N is also a spring. placed betweenthe lug H and the 'collar 0., By these two' s-prings acting reverselytoeach' othei 'agsinst the opposite side of the adjustable lug H, the rodand hammer P are kept at the same relative. distance from the adjustablelag H. -Thus, shouldthe end of the hammer be forced upward, the springNwill bring it down again. :On the contrary, should the rod and hammer beforced downward, the'spring M will bring it back. Also, should the lug Hbe movedupward and dbwnward inthe slot, the rod and hammer will becarried with it in either direction. Q, fig. 2, is a. slottedsegmgnt,-the end, Q, of which is connected to the crank-wheel by a link,R, and the opposite end connects with a lever, B, by a link, S. Throughthe .slot in the segment referred to projects the end S of the lug H,and by which the hammer is operated as follows, viz:

On' turning the crank-wheel to which the end of the segment arm isconnected, it will be evident that in so doing, the end Q of the segmentwill be given a vertical reciprocating movement, whereas the oppositeand X connected 'to the lever will remain stationary, it being thecentre of the movement of-the segment. 'As the segment movesnpward anddownward,it will give to the rod and hammer the same vertical reciprocalmovement bymeansof the end or pin of the lug H embraced in the slot, thelength of the stroke of the hammer being more or lessas the pin ismoved-nearer to or from the centre X, and which is efi'ected by thelever R, This lever, as above said, is connected to the'X end of thesegment, hence by depressing the end of the lever will cause the segmentto slide forward and thus bring the pin close to the centre ofvibration, and thereby lbsscnthe length of the strokes of the hammer,and so on reversing the direction of the lever, will throw the segmentbackmore-or less, andtherefore will lengthen 'the stroke as thodistancemay be.

. Power-hammers as nsnallyconstructed have no means of regulating thelength of the stroke, hence the blows given are always of equal force,whether rapidly or slowly given- It is often desirable that the blowsshould begivien quickly and at thesame time lightly, as the nature-ofthe work is'such as to make it necessary to handle itin theleastpossible time. With the ordinary power-hammer this cannot be done, asthe blows are given with thesame force when given slowly as when made inquick succession. With the hammer above described this'difioulty isobviated, as the length of the'strolre can be easily con-trolled by thelever R which' is conveniently close to thediand of the operator, andthus he can increase or lessen thelcngth of the stroke, as the case maybe, without stopping or checking the speed. with which the blows aregiven. The collars L 0 are so placed on the rod as to admit of theirbeing brought nearer to ormoved away from the lag H, and are retained inposition by the pin 1?, thereby increasing or diminishing the tension ofthe springs M N. By this itis obvi- -oas thaton adjusting the. collarsso as to bring theni closer to the lug H, the tension of the springswill he accordingly increased, and will thereby increase the cfi'ectiveforce of the blow given by the hammer P. By

this means the force of the blow on be easily graduated to any desireddegree, at the same time-increasing or y the lever B, thus plu'cing opemtoiu' y improvement, and deeire'to secure by Letters Patent, is-

1Q The links vR S, lever R, and slotted aegmebt Q, as arranged, incombination with the lug H, for the purposeand in the manner as setforth.

2. The adjustable collars L O, springs M N, in combinatioirwi-th' therod- K and adjust'ahlejug H, as and for the purpose herein descrjbed.

ALBERT CUNNINGHAM,

ALONZO SHARP. witnesseaz" Tnoms SHARP,

Snmou BTRA'LTON.

the length 61 the stroke and the efieetive

